Multiple switch speed controlled mechanism



Jan. 29, 1957 w. J. WILLIAMS 2,779,836

MULTIPLE SWITCH SPEED CONTROLLED MECHANISM Filed Feb. 16, 1954 4Sheets-Swat l Fl ELY.

ATTO/PNZEY w. J. WILLIAMS 2,779,836

MULTIPLE SWITCH SPEED CONTROLLED MECHANISM 4 Sheets-Sheet 2 Jan. 29,1957 Filed Feb. 16, 1954 a; nil

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MULTIPLE swma SPEED CONTROLLED MECHANISM Filed Feb. 16, 1954 4Shets-Sneet 5 TOP POSFHON RAW 59R RA N65 5 PR.

ADJ. ELEME T SPR.

REMIfQQMSH-QFT IN V EN TOR. W/Mbm d, Wi/l/ams FlUXQJ/MW ATTORNEY SWW'CHADJ, INKREMENTS Jan. 29, 1957 w, J WILUAMS 2,779,836

MULTIPLE SWITCH SPEED CONTROLLED MECHANISM Filed Feb. 16, l954 4Sheets-Sheet 4 ATTORNEY United States Patent MULTIPLE SWITCH SPEEDCONTRGLLED MECHANISM William J. Williams, Wilmette, iii. ApplicationFebruary 16, 1954, Serial Nut 41%,5-55

Claims. (Cl. 200-861) This invention relates to circuit controllingmeans adapted to open, close or transfer circuits in accordance withpredetermined speeds of-rotation of an element, an engine or other.rotary means associated with the system involved or with which thecircuit controlling means are to be connected.

An object of my invention is to provide an extremely versatileadjustable and etficient control mechanism for multiple stage operationsactuating a plurality of switching means to effect changes in seriatumof said circuits according to a large number of desired conditions bothupon an increasing and a decreasing speed of a rotational unit such asva governor, for example.

More specifically, my invention includes the provision of aself-contained compact driven unitwith the plural controlling mechanismincorporated therein in an etficient manner for desired operation inpredetermined orders. This invention also provides specific means forready adjustment of each individual switching mechanism as well asadjustment for the overall combined action of my improved arrangementfor a given system.

Further objects and advantages are within the scope of this inventionsuch as relate to the arrangement, operation and function of the relatedelements of the structure, to various details of construction and tocombinations of parts, elements per se, and to economics of manufactureand numerous other features as will be apparent from a consideration ofthe specification and drawings of a form of the invention, which may bepreferred, in which:

Figure I is a side elevation of the installation on the end of agovernor with the housing removed, parts being shown in section;

Figure I-A is a detail taken on the line I-A--I-A of Figure I;

Figure II is a top plan view;

Figure III is a section taken on the line IIIIII of Figure I;

Figure IV'is a section taken on the line IV-IV of Figure I;

Figure V is a partial sectional view similar to Figure I showing theoperating mechanism in one switch operating position;

Figure VI is a sectional view taken on the line VI-VI of Figure V;

Figure VII is a sectional elevation similar to Figure V showing anotherposition of the switch mechanism;

Figure VIII is a section taken on the line VIIIVIII of Figure VII;

Figure IX is a sectional elevation similar to Figure V showing a stillfurther position;

Figure X is a diagrammatic illustration of the action of the switchescorrelatedto the governor control;

Figure XI is a vertical sectional view of a modification of my inventionin which two switches are controlled, the mechanism shown in inoperativeposition;

Figure XII is an elevational view of Figure XI showing an adjustingmechanismfor'the casing;

Patented Jan. 229, i957 Figure XIII is a section taken on the lineXIII-XIII of Figure XI;

Figure XIV is a transverse section taken on the line XN-XiV of FigureXI; and

Figure XV is a vertical sectional view similar to Figure Xi, but showingone of the switches in operative position.

Referring to the drawings, Within a suitable housing (not shown) mountedis (as in my prior Patent No. 2,457,192) the governor shaft 12, therevolutions of which may vary by being connected with some mechanismwhose speed varies. The shaft 12 carries the rotatable support 14 forthe governor weights 15', the support 14 being pinned to the shaft 12 inthe illustration. These governor weights 15 are pivoted as at point 16to the support 14 so that under the centrifugal action of the revolvingof shaft 12 these weights move outwardly and downwardly around the point16 as a center.

A freely movable sliding plunger or controlling element 18 is providedwith collars 19 and 19, while the Weights 15 have a contact tongue orcam 26 fitting between collars 19 and 19 and adapted to move the plunger13 longitudinally in line with the axis of the shaft 12 as earn 2% ofthe weights moves upwardly and downwardly as shown. It is to be notedthat the weights 15 are recessed to receive the collar 19.

Each weight 15 is connected to the other weight by specially constructedrange springs 21, one end of each spring 21 having an elongated loop 22at one end and a closed end 23'at the other. These springs 21 controlthe weight but are not in the position illustrated in Figure I until thegovernor is at rest. As in my prior patent, I may provide a governorhaving a straight line curve in operation. The springs 21 have amodifying influence on the action of the weights 15.

The present invention relates primarily to improved switching meansdesigned to open and close, or transfer circuits at definite speedscontrolled by said governor action, which speeds may be set as desiredfor many varying conditions. In the embodiment illustrated, the governormechanism is associated with three switches each of which transfers itscontact when the governor reaches a predetermined speed and each istransferred back again when the speed drops, all as determined by thevarious settings hereinafter set forth.

Referring to Figure I, the top cover plate 24 is intended to be securedto the housing of the mechanism. Depending from this cover 24 and fixedthereto are three switch devices 25, 26 and 27 symmetrically arrangedaround the axis of the governor as illustrated in Figure III, forexample. Each of these switch-es has upwardly and downwardly switchoperating pins, switch 25 having downwardly extending pin 23 andupwardly extending pin 29, switch 26 having the downwardly extending pin36 and upwardly extending pin 31 and the switch 27 having downwardlyextending pin 32 and upwardly extending pin 33.

The main operating mechanism for these switch pins consists of two discs35 and 36 connected together by suitable spacers 37 so that each disc 35and 35 moves longitudinally and tilts as a unit with the other disc.Figure I illustrates the lowermost inoperative position of the mechanismwhere it will be seen that the lower disc 35 has a recess 38 wherebythis floating disc mechanism is piveted at the end of a thrust bearingcarried on the governor shaft by the plunger 18. The pivot isillustrated at 35. A suitable ball bearing 40 has the outer casingthereof prevented from rotating by connection 41 with the lower plate 35while the plunger 18 is centered on the inner ball race of said unit 40.It will be understood that the floating disc unit 35-36 may moveupwardly and downwardly and tilt to a certain degree but is preventedfrom rotating as will hereinafter appear.

As the governor speed increases, the plunger 18 will move upwardly andsince it pivotally supports the lower plate 35 on the pivot 39, I haveprovided a mechanism for causing the plates to actuate the pins of theswitches in a desired sequence due to the movement and tilting of saidfloating disc unit 35 and 36. To this end, I have three depending springloaded pivot points 42, 43 and 44 depending from the cover 24 by asuitable adjusting mechanism forming an important part of my invention.Thus, as illustrated more particularly in Figure V, one of the pivots 42is actually constructed in the form of a plunger element having a head45 located within a tube 46, said tube being fixed in the cover plate 24attached to the housing of the mechanism. Above the head 45 of the pivotplunger 42 is a spring 47 loaded to produce a certain resistance againstmovement of the plunger by the plate 35 and in order to provide anadjustable means therefor, I provide within the upper end of the tube46, a central screw-threaded adjustable pin 48 so that by adjusting thesame in the screw threads in the inside of the tube 46 the load on thespring 47 may be changed as desired. A suitable way for fixing the tube46 to the head 24 is to provide the same with a lower collar 50 andexternal screw threads 51 whereupon the tubular nut 52 may be used toclamp the tube 46 into the head 24 by reason of the flange 50. Thesameconstruction is used for each of the other pivot points 43 and 44.

As shown in Figures II and III, it will be noted that these pivot pins42, 43 and 44 are symmetrically arranged around the governor axis andthat the several switch pins of the switches 25, 26 and 27 are radiallyin line with the pivots 42, 43 and 44.

Since the adjustability of the'operation of the switching mechanism isan important feature of my invention, I also provide means for varyingthe time at which the upper switch pins of the several switches 25, 26and 27 may be operated. To this end, as shown in Figures I and V, theupper plate 36 carries three switch pin contacting elements, each in theform of a screw-threaded small cylinder 54 screw-threaded in the upperplate 36, and is provided with a pair of lock nuts 55 and 56 so thatupon withdrawal of the same from the plate the contact element orcylinder 54 may be adjusted upwardly or downwardly and locked in fixedposition by the cooperating lock nuts 55 and 56 screw-threaded on theoutside of said contactor 54. It is to be understood that I also providetwo similar adjustable contact units 57 and 58 symmetrically arrangedaround the axis of the governor, as shown in Figure 111, and each ofthese contacts 57 and 58 are adjustable as described above in connectionwith the lock nuts 55 and 56 for the adjustable contactor 54. It will bealso noted that these several contacts 54, 57 and 58 are radially inline with the pivots 42, 43 and 44.

It will be noted that centrally above the cover plate, I providesuitable electrical terminal connectors 69 by means of which variousline wires can be connected and properly connected with the variousswitches 25, 26 and 27, dependent on any particular installation of thecontrolling apparatus.

The operation of the mechanism is as follows:

As the speed of the governor increases, the plunger 18 and consequentlythe pivot 39 move upwardly. Since the pivot 39 carries the floating dualdisc member having the plates 35 and 36, this element moves accordingly.The various adjustments for the pivots 42, 43 and 44 having been made asdesired so that the various loaded springs operate at diiferent times,it will be seen that as the lower disc 35 moves upwardly, as in FigureV, for example, the plate 35 moves pin 42 overcoming the pressure of thespring 47 so that the plunger retracts in the tube 46 the same. Thesprings for the pivots 43 and 44 both being loaded to a higher degreethan the spring for pivot 42, resist upper movement of the plate 35 inthe action just described, so that, the pivot 42 having retracted theplate pivots around a line connecting the two pivots 43 and 44 rasse.

to force the pivot 42 to retract so that the plate operates the switchpin 28 of the switch 25.

As the speed of the governor still further increases, the plunger 18moves still further upwardly carrying with it the dual plate mechanism35 and 36. Since the resistance of the spring for the pivot 43 is lessthan for the pivot 44, the pivot 43 thereupon retracts and the plate 35tilts around an axis formed by a line between pivots 44 and 42.Consequently, the lower pin 30 of switch 26 is now operated at theproper time as determined by the adjustments.

As the governor speed still further increases and the plunger 18 movesstill further upwardly, as shown in Figure IX, the last switch isoperated since plate 35 nowtilts around a line formed by the pivots 42and 43. This causes the lower plate 35 to contact the switch pin 32 ofthe third switch 27. The position of the actuating mechanism in thiscondition is illustrated in Figure IX where itwill be seen that theplate 35 is substantially horizontal and contacting the ends of thetubes 46 for the respective pivots 42, 43 and 44 and all the lowerswitch pins of the switches 25, 26 and 27 have been actuated by theaction described.

Upon reversal of the speed and a decrease therein, the plunger 18naturally lowers. This brings into play the upper floating disc 36 andit is this. disc which operates the upper pins 29, 31 and 33 of theswitches 25, 26 and 27; Simultaneously with this action, the lower plate35 will be sequentially removed from the previously described action or"operating the lower switch pins 28, 39 and 32 of said switches. T 0further consider the action of the upper plate 36, it will be noted thatthe various adjustments in the locking nuts and 56 for the severalcontactors 54, 57 and 58 must have been set at the desired position,whereupon as the plate 36 moves downwardly due to the recession of theplunger 18, this plate 36 being fixed to the lower plate 35 will betilted in the reverse order from that just described as to the tiltingof the lower plate on the upper movement of the plunger. 18.. Forexample, the contactor 58 illustrated in Figure V will contact the upperpin 33 of the switch 27 before the other switches 26 and 25 are operatedon the reverse order of the descending plunger 18.

This action is illustrated in the diagram of Figure X which is acomposite of the action of the mechanism in that the speeds of thegovernor illustrated in the coordinates and in the lower scale theordinate is an increment of adjustment for the means controlling thelower plate 35 while at the top the ordinates are indicated as units foradjustment for the several contactor elements 54, 57 and 58 for theupper plate 36. In this chart of the diagram of Figurev X, the full linerepresents the action of the lower switch pins upon increasing speedsand the dotted line illustrates the action of the upper switch pins 33,31 and 29 upon the descending action of the upper plate 36. Unless theadjustments provided herein were utilized the full lines and dottedlines of Figure X would be parallel, but by the various adjustmentsherein provided, I may be able to vary the relative times at which anyone of the switches 25, 26 or 27 may be reversely operatedcompared withits time of operation on the upwardly extending action of the governorthrough the plunger 18.

In the two switch control mechanism shown in Figures XI-XV, I use therange springs 21 connecting the governor weights, the springs having theelongated loop 22 on one end and the closed loop 23 on the other end asin the other embodiment. In this embodiment, however, I use only onefloating plate 60 with two adjustable pivot posts 61 and 62 to regulatethe tiltingof the single plate 60 as it is moved upward by the thrustbearing 64 on the upper end of the governor shaft. These pivot posts 61and 62 are substantially similar to the pivots 50 shown in section inFigure V of the other modification and the sequential contact therewithby the tilting of plate 60 operates switches 65 and 66 in one direction,in seriaturn, these switches being returned tooriginal positionbygravity or internal switch springs. It is to .be understood that thespeed of the governor controlsthe position'of thethrust bearingd lras'in the other embodiment so that the action is speed controlled. It isto be noted particulary in Figure XIII that the plate 60 is preventedfrom rotating by ears 68 and 69 on angle pieces 70 located ondiametrically opposite portions of the casing, as shown. In order toprevent the outer race of the thrust bearing 64 from rotating, I alsoprovide opposite radial extension plates 72 connected to the outer racebearing 64, said radial extensions having upwardly turned ends 73 which,by contact with said angle pieces 70, prevent rotation of the outerportion of the thrust bearing 64.

In this embodiment illustrated in Figures XI to XV, the two partrelatively adjustable housing 75 is used to adjust and set the generaltime for operation of the entire two switch adjustable mechanism.Specifically, I show in Figures Xli and XIV, three circumferentiallyarranged inclined slots 76. The lower fixed part of the governor casing75 is provided with set screws 7'7 adapted to be positioned within saidslots 76 so that by twisting the housing 75' the position longitudinallyof the axis of the governor shaft will be varied by reason of this pinand slot connection '76 and '77. It is to be understood that the screws77 may be screwed home and hold the housing '75 in any set positiondesired within the limits of the slot 76.

The range springs 21 and the individually adjustable pivots and 62determines the exact operation of each of the two' switches controlledin the mechanism of this embodiment of Figures Xl-XV, and operatesimilarly to the operation of these elements in the embodimentillustrated in Figures I to X.

It is apparent that, within the scope of the invention, modificationsand diiferent arrangements may be made other than is herein disclosed,and the present disclosure is'illustrative merely, the inventioncomprehending all variations thereof.

What I claim is:

l. A multiple switch opening and closing speed controlled mechanismincluding a housing; a governor mechanism within said housing adapted tobe driven'at various speeds; an extendable and retractible memberlocated in said housing and controlled by said governor; a plurality ofelectrical switch units spaced around the axis of the governor and fixedin said housing, said switch units each having oppositely extendingactuating pins with the axis of said pins substantially parallel to saidaxis; a pair of movable connected spaced movable and tiltable disks, oneon one side and the other on the other side of said switch units, saiddisks having means to contact and actuate said switch pins, saidgovernor member positioned in contact with one of said disks to moveboth disks proportionately to the movement of said member dependentupon. said governor speed whereby a disk contacts said switch pins toactuate said switches in seriatum in one direction; means to move saiddisks in the opposite direction whereby a disk actuates said switches inthe opposite direction; and means to adjust the relative position of theswitch pin contacting means of said disks to vary the predeterminedspeeds for both opening and closing said switches.

2. in combination, a governor spindle raised and lowered according tospeed; a housing carrying three switches and switch pins spacedtransversely around the governor shaft above said spindle; a retractablespring loaded pivot pin adjacent each switch pin; a fixed tube aroundeach pin, each or" said springs being loaded to release at successivelydifferent pressures around the governor axis; and a tiltable platemovably carried by said governor spindle and adapted to contact andretract the least loaded spring held pivot, said plate arranged uponfurther movement of said spindle to contact the other two pivots andtilt along a line joining said pivots whereby said plates actuates the.

switch adjacent said first pivot; further movement of said governorspindle causing the second of said spring loaded pivot'toretract saidplate tilts in another plane along a line joining the third pivot andthe end of the tube surrounding the first pivot to actuate the secondswitch; and still further movement of said governor spindle causes saidplate to move along the axis of said governor spindle to actuate thethird switch and thereafter contact the lower ends of all three pivotenclosing tubes.

3. In combination, a governor spindle raised and lowered according tospeed; a housing carrying three switches and switch pins spacedtransversely around the governor shaft above said spindle; a retractablespring loaded pivot pin adjacent each switch pin; a fixed tube aroundeach pin, each of said springs being loaded to release at successivelydifferent pressures around the governor axis; and a tiltable platemovably carried by said governor spindle and adapted to contact andretract the least loaded spring held pivot, said plate arranged uponfurther movement of said spindle to contact the other two pivots andtilt along a line joining said pivots whereby said plate actuates theswitch adjacent said first pivot; further movement of said governorspindle causing the second of said spring loaded pivot to retract saidplate tilts in another plane along a line joining the third pivot andthe end of the tube surrounding the first pivot to actuate the secondswitch; and still further movement of said governor spindle causes saidplate to move along the axis of said governor spindle to actuate thethird witch and thereafter contact the lower ends of all three pivotenclosing tubes; and another movable and tiltab-le plate connected tomove with said first plate, located in said housing above said switches,said switches having another set of pins in the line of movement of saidplate to actuate said switches in the reverse direction from saidfirst-mentioned pins; said last-mentioned plate adapted to actuate saidlast-mentioned pins in seriatum in the reverse order of their actuationby the first plate.

4. A multiple switch closing and opening speed controlled mechanismincluding a housing; a governor mechanism within said housing adapted tobe driven at various speeds; an extendable and retractable shaft locatedin said housing and controlled by said governor; a plurality ofelectrical switch units spaced around said shaft and fixed in saidhousing, said switch units each having outwardly extending actuatingpins with the axis of said pins substantially parallel to said shaft;movable floating disk. means; adjustable pivots for controlling saiddisks arranged to contact said switch pins to actuate said switches andmeans to adjust the position of each of said pivots relative to saiddisk to vary the predetermined times for actuating said switches, saidshaft positioned in contact with said disks and arrange to move saiddisks proportionately to the movement of said shaft dependent upon saidgovernor speed; and restraining range springs on said governor connectedwith the governor weights to control the action of said extendable andretractable shaft, said range springs having means to render saidsprings ineffective during the initial range of speeds of said governorand cooperating with the setting of the adjustment of said switchpivots.

5. A multiple switch closing and opening speed controlled mechanismincluding a housing; a governor mechanism within said housing adapted tobe driven at various speeds; an extendable and retractable shaft locatedin said housing and controlled by said governor; a plurality ofelectrical switch units spaced around said shaft and fixed in saidhousing, said switch units each having actuating pins positioned withthe axis of said pins substantially parallel to said shaft; a movablefloating disk located adjacent said pins of said switch units; springloaded ad justa-ble pivots adapted to be contacted by said disk, saiddisk arranged to actuate said switch pins in a predetermined sequenceunder control of said pivots and dependent upon said extendable andretractable shaft, means to adjust the position of each of said pivotsrelative to said disk to vary the predetermined times for actuation ofsaid pins for actuating said switches, said shaft positioned in contactwith said disk and arranged to move said disk proportionately to themovement of said shaft dependent upon said governor speed; andrestraining range springs connected with the fly weights of saidgovernor and having means to provide delayed control of the action ofsaid governor on said extendable and retractable shaft, said rangesprings cooperating with the setting of the adjustment of said switchpivots.

6. A multiple switch closing and opening speed controlled mechanismincluding a two part housing, said parts being relatively adjustablewith respect to each other; a governor mechanism within one of saidhousing parts adapted to be driven at various speeds; an extendable andretractable shaft located in said housing and controlled by saidgovernor; a plurality of electrical switch units spaced around saidshaft and fixed in the other of said housing parts, said switch unitseach having actuating pins positioned with the axis of said pinssubstantially parallel to said shaft; a movable floating disk locatedadjacent said pins of said switch units; spring loaded adjustable pivotsadapted to be contacted by said disk, said disk arranged to actuate saidswitch pins in a predetermined sequence under control of said pivots anddependent upon said extendable and retractable shaft, means to adjustthe position of each of said pivots relative to said disk to vary thepredetermined times for actuation of said pins for actuating saidswitches, said shaft positioned in contact with said disk and arrangedto move said disk proportionately to the movement of said shaftdependent upon said governor speed; range springs on said governor toprovide delayed control of the action of said extendable and retractableshaft, said range springs cooperating with the setting of the adjustmentof said switch pivots; and said two part housing portions havingoverlapping contacting flanges; an inclined slot on one of said flangesand a locking set screw passing from the outside through said slot tothe other flange of the other housing part whereby turning one of saidhousing parts adjusts the relative position of said two part housingportions to vary the position of said switch pins relative to saidgovernor controlled operating mechanism therefor.

7. In an automatic speed controlled multiple switching mechanism havingnot less than three switch units, the combination of a housing assembly;a governor mechanism within said housing adapted to be driven at variousspeeds; an extendable and retractable shaft controlled by said governor;a switch actuating assembly including a pair of spaced members connectedto move in unison; means securing a plurality of oircumferentiallyspaced switch units in a housing part, said switch units positionedbetween said spaced members and spaced therefrom; a plurality ofseparately adjustable spring loaded pivots supported within a housingpart so as to be contacted by said switch actuating members; meansassociated with each switch unit whereby one of said members closes aswitchtand means whereby the other of said members opens the sameswitch; means controlled by said extendable and retractable shaftwhereby said members move in unison in one direction to cause saidmembers to contact said pivots to tilt said members to cause saidmembers to efiect closing of a switch and said members move in theopposite direction to effect opening of said switch at a predeterminedspeed independently of the closing of the same switch.

8. A multiple switch closing and opening speed controlled mechanismincluding a two part housing, said parts being relatively adjustablewith respect to each other; a governor mechanism within one of saidhousing parts adapted to be driven at various speeds; an extendable andretractable shaft located in said housing and controlled by saidgovernor; a plurality of electrical switch units spaced around saidshaft and fixed in the other of said housing parts, said switch unitshaving actuating pins positioned within said housing to be automaticallyactuated to close and open said switches; a pair of movable fioatingswitch pin actuating elements located adjacent said pins of said switchunits; spring loaded adjustable pivots adapted to be contacted by saidelements, said elements arranged to move in unison and to actuate saidswitch pins in a predetermined sequence under control of said pivots anddependent upon said extendable and retractable shaft, means to adjustthe position of each of said pivots relative to said elements to varythe predetermined times for actuation of said pins for actuating saidswitches, said shaft positioned in contact with one of said elements andarranged to move said elements proportionately to the movement of saidshaft dependent upon said governor speed; governor weight controllingsprings on said governor to provide control of the action of saidextendable and retractable shaft, said governor weight controllingsprings cooperating with the setting of the adjustment of said switchpivots; and said two part housing portions having overlapping contactingflange portions; an inclined slot on one of said flange portions and alocking set screw passing from the outside through said slot to theother flange portion of the other housing part whereby turning one ofsaid housing parts adjusts the relative position of said two parthousing portions to vary the position of said switch pins relative tosaid governor controlled operating mechanism therefor.

9. In combination, an extendab le and retractable shaft adapted to beraised and lowered according to various controlling condition responsivemeans; a housing carrying a plurality of switches and switch pins spacedtransversely around said shaft above said condition responsive means; aretractable'spring loaded pivot pin adjacent each switch pin; a fixedtube around each pin, each of said springs being loaded to release atsuccessively different pressures; and a tiltable plate movably carriedby said shaft and adapted to move and retract the least loaded springheld pivot, said plate arranged upon further movement of said shaft totilt along a line joining two pivots whereby said plates actuates theswitch adjacent said first pivot; further movement of said shaft causingthe second of said spring loaded pivots to retract and said plate tiltsin another plane along a line joining a pivot and the end of the tubesurrounding the first pivot to actuate another switch.

10. A multiple switch closing and opening speed controlled mechanismincluding a two part housing, said parts being relatively adjustablewith respect to each other; a governor mechanism within said housingadapted to be driven at various speeds; an extendable and retractableshaft located in said housing and controlled by said governor; aplurality of electrical switch units spaced around said shaft and fixedin one of said housing parts, said switch units having actuating pinspositioned within said housing to be automatically actuated to close andopen said switches; a movable disk located adjacent said pins of saidswitch units; spring loaded adjustable pivots adapted to be contacted bysaid disk, said disk arranged to actuate said switch pins in apredetermined sequence under control of said pivots and dependent uponsaid extendable and retractable shaft, means to adjust the po sition ofeach of said pivots relative to said disk to vary the predeterminedtimes for actuation of said pins for actuating said switches, said shaftpositioned in contact with said disk and arranged to move said diskproportionately to the movement of said shaft dependent upon saidgovernor speed; governor weight controlling said springs on saidgovernor to provide control of the action of said extendable andretractable shaft, said governor weight controlling springs cooperatingwith the setting of the adjustment of said switch pivots; and said twopart housing portions having overlapping contacting portions; aninclined slot on one of said portions and a locking set screw passingfrom the outside through said slot to References Cited in the file ofthis patent UNITED STATES PATENTS Lefler Nov. 16, 1948 Williams Dec. 28,1948

